package com.neusoft.elmboot.util;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class CommonUtil {

	public static String getCurrentDate() {
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
		Date date = new Date(System.currentTimeMillis());
		String ans = formatter.format(date).toString();
		return ans;
	}
	
	public static String getPreviousDate() {
	    SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
	    Calendar calendar = Calendar.getInstance();
	    calendar.add(Calendar.DAY_OF_MONTH, -7);
	    Date previousDate = calendar.getTime();
	    String ans = formatter.format(previousDate);
	    return ans;
	}
	
	public static String getExpirationDate() {
	    SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
	    Calendar calendar = Calendar.getInstance();
	    calendar.add(Calendar.DAY_OF_MONTH, -6);
	    Date previousDate = calendar.getTime();
	    String ans = formatter.format(previousDate);
	    return ans;
	}
	
	public static void main(String[] args) {
		getCurrentDate();
	}
}
